package com.reggie.service.impl;

import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
import com.baomidou.mybatisplus.core.toolkit.IdWorker;
import com.baomidou.mybatisplus.extension.plugins.pagination.Page;
import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
import com.reggie.common.BaseContext;
import com.reggie.common.CustomException;
import com.reggie.common.R;
import com.reggie.dto.OrdersDto;
import com.reggie.entity.*;
import com.reggie.mapper.OrdersMapper;
import com.reggie.service.*;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import java.math.BigDecimal;
import java.time.LocalDateTime;
import java.util.ArrayList;
import java.util.List;
import java.util.concurrent.atomic.AtomicInteger;
import java.util.stream.Collectors;

@Service
public class OrdersServiceImpl extends ServiceImpl<OrdersMapper, Orders> implements OrdersService {
//    @Autowired
//    private OrderDetailService orderDetailService;
//    @Autowired
//    private ShoppingCartService shoppingCartService;
//    /**
//     * 订单提交
//     * @param orders
//     */
//    @Transactional
//    public void submit(Orders orders) {
//        //下单备注 地址id 支付方式
//        //提交过来之后 要把东西都存好
//        //下单用户
//        orders.setUserId(BaseContext.getCurrentId());
//        //下单时间
//        orders.setOrderTime(LocalDateTime.now());
//        orders.setCheckoutTime(LocalDateTime.now());
//        //实收金额 点的东西在购物车里面
//        LambdaQueryWrapper<ShoppingCart> lqwS = new LambdaQueryWrapper<>();
//        lqwS.eq(ShoppingCart::getUserId,BaseContext.getCurrentId());
//
//        //查看当前用户的购物车
//        List<ShoppingCart> shoppingCarts = shoppingCartService.list(lqwS);
//        BigDecimal amount = new BigDecimal(0);
//        for (ShoppingCart shoppingCart : shoppingCarts) {
//            amount.add(shoppingCart.getAmount());
//        }
//        //下单价格
//        orders.setAmount(amount);
//        //存入订单
//        super.save(orders);
//
//        /**订单明细*/
//        //订单id
//        Long orderId = super.getById(orders).getId();
//        //先看看有多少个菜品 或者套餐把
//        //当前用户的购物车
//        //一个订单对应多个订单详细(对应多个菜品或者套餐)
//        List<OrderDetail> orderDetails = new ArrayList<>();
//        for (ShoppingCart shoppingCart : shoppingCarts) {
//            OrderDetail orderDetail = new OrderDetail();
//            //订单id
//            orderDetail.setOrderId(orderId);
//            if (shoppingCart.getDishId()!=null){
//                //是菜品的时候
//                orderDetail.setDishId(shoppingCart.getDishId());
//                //菜品还要整口味
//                orderDetail.setDishFlavor(shoppingCart.getDishFlavor());
//            }else {
//                //套餐
//                orderDetail.setSetmealId(shoppingCart.getSetmealId());
//            }
//            //数量
//            orderDetail.setNumber(shoppingCart.getNumber());
//            //金额
//            orderDetail.setAmount(shoppingCart.getAmount());
//        }
//        //存入订单明细
//        orderDetailService.saveBatch(orderDetails);
//    }
@Autowired
private ShoppingCartService shoppingCartService;

    @Autowired
    private UserService userService;

    @Autowired
    private AddressBookService addressBookService;

    @Autowired
    private OrderDetailService orderDetailService;

    /**
     * 用户下单
     * @param orders
     */
    @Transactional
    public void submit(Orders orders) {
        //获得当前用户id
        Long userId = BaseContext.getCurrentId();

        //查询当前用户的购物车数据
        LambdaQueryWrapper<ShoppingCart> wrapper = new LambdaQueryWrapper<>();
        wrapper.eq(ShoppingCart::getUserId,userId);
        List<ShoppingCart> shoppingCarts = shoppingCartService.list(wrapper);

        if(shoppingCarts == null || shoppingCarts.size() == 0){
            throw new CustomException("购物车为空，不能下单");
        }

        //查询用户数据
        User user = userService.getById(userId);

        //查询地址数据
        Long addressBookId = orders.getAddressBookId();
        AddressBook addressBook = addressBookService.getById(addressBookId);
        if(addressBook == null){
            throw new CustomException("用户地址信息有误，不能下单");
        }

        long orderId = IdWorker.getId();//订单号

        AtomicInteger amount = new AtomicInteger(0);

        //组装订单明细信息
        List<OrderDetail> orderDetails = shoppingCarts.stream().map((item) -> {
            OrderDetail orderDetail = new OrderDetail();
            orderDetail.setOrderId(orderId);
            orderDetail.setNumber(item.getNumber());
            orderDetail.setDishFlavor(item.getDishFlavor());
            orderDetail.setDishId(item.getDishId());
            orderDetail.setSetmealId(item.getSetmealId());
            orderDetail.setName(item.getName());
            orderDetail.setImage(item.getImage());
            orderDetail.setAmount(item.getAmount());
            amount.addAndGet(item.getAmount().multiply(new BigDecimal(item.getNumber())).intValue());
            return orderDetail;
        }).collect(Collectors.toList());

        //组装订单数据
        orders.setId(orderId);
        orders.setOrderTime(LocalDateTime.now());
        orders.setCheckoutTime(LocalDateTime.now());
        orders.setStatus(2);
        orders.setAmount(new BigDecimal(amount.get()));//总金额
        orders.setUserId(userId);
        orders.setNumber(String.valueOf(orderId));
        orders.setUserName(user.getName());
        orders.setConsignee(addressBook.getConsignee());
        orders.setPhone(addressBook.getPhone());
        orders.setAddress((addressBook.getProvinceName() == null ? "" : addressBook.getProvinceName())
                + (addressBook.getCityName() == null ? "" : addressBook.getCityName())
                + (addressBook.getDistrictName() == null ? "" : addressBook.getDistrictName())
                + (addressBook.getDetail() == null ? "" : addressBook.getDetail()));
        //向订单表插入数据，一条数据
        this.save(orders);

        //向订单明细表插入数据，多条数据
        orderDetailService.saveBatch(orderDetails);

        //清空购物车数据
        shoppingCartService.remove(wrapper);
    }

    /**
     * 订单分页查询
     * @param page
     * @param pageSize
     * @return
     */
    public Page selectPage(int page, int pageSize) {
        //原始的
        Page<Orders> pageInfo = new Page<>(page,pageSize);
        //Dto的
        Page<OrdersDto> dtoPage = new Page<>();
        LambdaQueryWrapper<Orders> lqw = new LambdaQueryWrapper<>();
        lqw.eq(Orders::getUserId, BaseContext.getCurrentId());
        lqw.orderByDesc(Orders::getOrderTime);
        super.page(pageInfo,lqw);
        //除了原来的结果不要 其他都要
        BeanUtils.copyProperties(pageInfo,dtoPage,"records");

        List<Orders> orders = pageInfo.getRecords();
        //搞一个结果 把这些预先的装起来
        List<OrdersDto> ordersDtoList = new ArrayList<>();
        //把这些结果orders拿出来 然后找到菜品详细 order id 可以一一对应上
        for (Orders order : orders) {
            LambdaQueryWrapper<OrderDetail> lqwD = new LambdaQueryWrapper<>();
            lqwD.eq(OrderDetail::getOrderId,order.getId());
            //把该order对应的order详细取出来
            List<OrderDetail> orderDetails = orderDetailService.list(lqwD);
            OrdersDto ordersDto = new OrdersDto();
            //开始导入dto 设置dto的属性
            BeanUtils.copyProperties(order,ordersDto);
            ordersDto.setOrderDetails(orderDetails);//查出来的详细放进去
            ordersDto.setUserName(order.getPhone());
            ordersDto.setAddress(order.getAddress());
            ordersDto.setConsignee(order.getConsignee());
            ordersDtoList.add(ordersDto);
        }
        dtoPage.setRecords(ordersDtoList);
        return dtoPage;
    }

    /**
     * 管理端订单分页查询
     * @param page
     * @param pageSize
     * @return
     */
    public Page selectPageAdmin(int page, int pageSize) {
        //原始的
        Page<Orders> pageInfo = new Page<>(page,pageSize);
        //Dto的
        Page<OrdersDto> dtoPage = new Page<>();
        LambdaQueryWrapper<Orders> lqw = new LambdaQueryWrapper<>();
        //lqw.eq(Orders::getUserId, BaseContext.getCurrentId());
        lqw.orderByAsc(Orders::getPhone);
        lqw.orderByDesc(Orders::getOrderTime);
        super.page(pageInfo,lqw);
        //除了原来的结果不要 其他都要
        BeanUtils.copyProperties(pageInfo,dtoPage,"records");

        List<Orders> orders = pageInfo.getRecords();
        //搞一个结果 把这些预先的装起来
        List<OrdersDto> ordersDtoList = new ArrayList<>();
        //把这些结果orders拿出来 然后找到菜品详细 order id 可以一一对应上
        for (Orders order : orders) {
            LambdaQueryWrapper<OrderDetail> lqwD = new LambdaQueryWrapper<>();
            lqwD.eq(OrderDetail::getOrderId,order.getId());
            //把该order对应的order详细取出来
            List<OrderDetail> orderDetails = orderDetailService.list(lqwD);
            OrdersDto ordersDto = new OrdersDto();
            //开始导入dto 设置dto的属性
            BeanUtils.copyProperties(order,ordersDto);
            ordersDto.setOrderDetails(orderDetails);//查出来的详细放进去
            ordersDto.setUserName(order.getPhone());
            ordersDto.setAddress(order.getAddress());
            ordersDto.setConsignee(order.getConsignee());
            ordersDtoList.add(ordersDto);
        }
        dtoPage.setRecords(ordersDtoList);
        return dtoPage;
    }

}
